#!/usr/bin/env python3

from arcfour import arcfour

'''
Source of the test vectors:
    A Stream Cipher Encryption Algorithm "Arcfour"
    http://tools.ietf.org/html/draft-kaukonen-cipher-arcfour-03
'''

TEST_VECTORS = [
    ('CRYPTLIB',    {
        'Plain Text'  : (0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00),
        'Key'         : (0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF),
        'Cipher Text' : (0x74, 0x94, 0xC2, 0xE7, 0x10, 0x4B, 0x08, 0x79),
        }
    ),
    ('COMMERCE',    {
        'Plain Text'  : (0xdc, 0xee, 0x4c, 0xf9, 0x2c),
        'Key'         : (0x61, 0x8a, 0x63, 0xd2, 0xfb),
        'Cipher Text' : (0xf1, 0x38, 0x29, 0xc9, 0xde),
        }
    ),
    ('SSH ARCFOUR', {
        'Plain Text'  : (
            0x52, 0x75, 0x69, 0x73, 0x6c, 0x69, 0x6e, 0x6e,
            0x75, 0x6e, 0x20, 0x6c, 0x61, 0x75, 0x6c, 0x75,
            0x20, 0x6b, 0x6f, 0x72, 0x76, 0x69, 0x73, 0x73,
            0x73, 0x61, 0x6e, 0x69, 0x2c, 0x20, 0x74, 0xe4,
            0x68, 0x6b, 0xe4, 0x70, 0xe4, 0x69, 0x64, 0x65,
            0x6e, 0x20, 0x70, 0xe4, 0xe4, 0x6c, 0x6c, 0xe4,
            0x20, 0x74, 0xe4, 0x79, 0x73, 0x69, 0x6b, 0x75,
            0x75, 0x2e, 0x20, 0x4b, 0x65, 0x73, 0xe4, 0x79,
            0xf6, 0x6e, 0x20, 0x6f, 0x6e, 0x20, 0x6f, 0x6e,
            0x6e, 0x69, 0x20, 0x6f, 0x6d, 0x61, 0x6e, 0x61,
            0x6e, 0x69, 0x2c, 0x20, 0x6b, 0x61, 0x73, 0x6b,
            0x69, 0x73, 0x61, 0x76, 0x75, 0x75, 0x6e, 0x20,
            0x6c, 0x61, 0x61, 0x6b, 0x73, 0x6f, 0x74, 0x20,
            0x76, 0x65, 0x72, 0x68, 0x6f, 0x75, 0x75, 0x2e,
            0x20, 0x45, 0x6e, 0x20, 0x6d, 0x61, 0x20, 0x69,
            0x6c, 0x6f, 0x69, 0x74, 0x73, 0x65, 0x2c, 0x20,
            0x73, 0x75, 0x72, 0x65, 0x20, 0x68, 0x75, 0x6f,
            0x6b, 0x61, 0x61, 0x2c, 0x20, 0x6d, 0x75, 0x74,
            0x74, 0x61, 0x20, 0x6d, 0x65, 0x74, 0x73, 0xe4,
            0x6e, 0x20, 0x74, 0x75, 0x6d, 0x6d, 0x75, 0x75,
            0x73, 0x20, 0x6d, 0x75, 0x6c, 0x6c, 0x65, 0x20,
            0x74, 0x75, 0x6f, 0x6b, 0x61, 0x61, 0x2e, 0x20,
            0x50, 0x75, 0x75, 0x6e, 0x74, 0x6f, 0x20, 0x70,
            0x69, 0x6c, 0x76, 0x65, 0x6e, 0x2c, 0x20, 0x6d,
            0x69, 0x20, 0x68, 0x75, 0x6b, 0x6b, 0x75, 0x75,
            0x2c, 0x20, 0x73, 0x69, 0x69, 0x6e, 0x74, 0x6f,
            0x20, 0x76, 0x61, 0x72, 0x61, 0x6e, 0x20, 0x74,
            0x75, 0x75, 0x6c, 0x69, 0x73, 0x65, 0x6e, 0x2c,
            0x20, 0x6d, 0x69, 0x20, 0x6e, 0x75, 0x6b, 0x6b,
            0x75, 0x75, 0x2e, 0x20, 0x54, 0x75, 0x6f, 0x6b,
            0x73, 0x75, 0x74, 0x20, 0x76, 0x61, 0x6e, 0x61,
            0x6d, 0x6f, 0x6e, 0x20, 0x6a, 0x61, 0x20, 0x76,
            0x61, 0x72, 0x6a, 0x6f, 0x74, 0x20, 0x76, 0x65,
            0x65, 0x6e, 0x2c, 0x20, 0x6e, 0x69, 0x69, 0x73,
            0x74, 0xe4, 0x20, 0x73, 0x79, 0x64, 0xe4, 0x6d,
            0x65, 0x6e, 0x69, 0x20, 0x6c, 0x61, 0x75, 0x6c,
            0x75, 0x6e, 0x20, 0x74, 0x65, 0x65, 0x6e, 0x2e,
            0x20, 0x2d, 0x20, 0x45, 0x69, 0x6e, 0x6f, 0x20,
            0x4c, 0x65, 0x69, 0x6e, 0x6f),
        'Key'         : (
            0x29, 0x04, 0x19, 0x72, 0xfb, 0x42, 0xba, 0x5f,
            0xc7, 0x12, 0x77, 0x12, 0xf1, 0x38, 0x29, 0xc9),
        'Cipher Text' : (
            0x35, 0x81, 0x86, 0x99, 0x90, 0x01, 0xe6, 0xb5,
            0xda, 0xf0, 0x5e, 0xce, 0xeb, 0x7e, 0xee, 0x21,
            0xe0, 0x68, 0x9c, 0x1f, 0x00, 0xee, 0xa8, 0x1f,
            0x7d, 0xd2, 0xca, 0xae, 0xe1, 0xd2, 0x76, 0x3e,
            0x68, 0xaf, 0x0e, 0xad, 0x33, 0xd6, 0x6c, 0x26,
            0x8b, 0xc9, 0x46, 0xc4, 0x84, 0xfb, 0xe9, 0x4c,
            0x5f, 0x5e, 0x0b, 0x86, 0xa5, 0x92, 0x79, 0xe4,
            0xf8, 0x24, 0xe7, 0xa6, 0x40, 0xbd, 0x22, 0x32,
            0x10, 0xb0, 0xa6, 0x11, 0x60, 0xb7, 0xbc, 0xe9,
            0x86, 0xea, 0x65, 0x68, 0x80, 0x03, 0x59, 0x6b,
            0x63, 0x0a, 0x6b, 0x90, 0xf8, 0xe0, 0xca, 0xf6,
            0x91, 0x2a, 0x98, 0xeb, 0x87, 0x21, 0x76, 0xe8,
            0x3c, 0x20, 0x2c, 0xaa, 0x64, 0x16, 0x6d, 0x2c,
            0xce, 0x57, 0xff, 0x1b, 0xca, 0x57, 0xb2, 0x13,
            0xf0, 0xed, 0x1a, 0xa7, 0x2f, 0xb8, 0xea, 0x52,
            0xb0, 0xbe, 0x01, 0xcd, 0x1e, 0x41, 0x28, 0x67,
            0x72, 0x0b, 0x32, 0x6e, 0xb3, 0x89, 0xd0, 0x11,
            0xbd, 0x70, 0xd8, 0xaf, 0x03, 0x5f, 0xb0, 0xd8,
            0x58, 0x9d, 0xbc, 0xe3, 0xc6, 0x66, 0xf5, 0xea,
            0x8d, 0x4c, 0x79, 0x54, 0xc5, 0x0c, 0x3f, 0x34,
            0x0b, 0x04, 0x67, 0xf8, 0x1b, 0x42, 0x59, 0x61,
            0xc1, 0x18, 0x43, 0x07, 0x4d, 0xf6, 0x20, 0xf2,
            0x08, 0x40, 0x4b, 0x39, 0x4c, 0xf9, 0xd3, 0x7f,
            0xf5, 0x4b, 0x5f, 0x1a, 0xd8, 0xf6, 0xea, 0x7d,
            0xa3, 0xc5, 0x61, 0xdf, 0xa7, 0x28, 0x1f, 0x96,
            0x44, 0x63, 0xd2, 0xcc, 0x35, 0xa4, 0xd1, 0xb0,
            0x34, 0x90, 0xde, 0xc5, 0x1b, 0x07, 0x11, 0xfb,
            0xd6, 0xf5, 0x5f, 0x79, 0x23, 0x4d, 0x5b, 0x7c,
            0x76, 0x66, 0x22, 0xa6, 0x6d, 0xe9, 0x2b, 0xe9,
            0x96, 0x46, 0x1d, 0x5e, 0x4d, 0xc8, 0x78, 0xef,
            0x9b, 0xca, 0x03, 0x05, 0x21, 0xe8, 0x35, 0x1e,
            0x4b, 0xae, 0xd2, 0xfd, 0x04, 0xf9, 0x46, 0x73,
            0x68, 0xc4, 0xad, 0x6a, 0xc1, 0x86, 0xd0, 0x82,
            0x45, 0xb2, 0x63, 0xa2, 0x66, 0x6d, 0x1f, 0x6c,
            0x54, 0x20, 0xf1, 0x59, 0x9d, 0xfd, 0x9f, 0x43,
            0x89, 0x21, 0xc2, 0xf5, 0xa4, 0x63, 0x93, 0x8c,
            0xe0, 0x98, 0x22, 0x65, 0xee, 0xf7, 0x01, 0x79,
            0xbc, 0x55, 0x3f, 0x33, 0x9e, 0xb1, 0xa4, 0xc1,
            0xaf, 0x5f, 0x6a, 0x54, 0x7f),
        }
    ),
]

for name, vectors in TEST_VECTORS:
    print(name, end='')
    plain = bytearray(vectors['Plain Text'])
    cipher = bytearray(vectors['Cipher Text'])
    key = bytearray(vectors['Key'])
    assert cipher == arcfour(key, plain, loops=1)
    assert plain == arcfour(key, cipher, loops=1)
    print(' --> OK')
